Energy generation from carbonaceous and nitrogenous pollutants via ammonium, methane, and carbon dioxide reformation

P. H. Leel, Meng Ni, L. Xu, F. Dong

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

Abstract

A novel integrated electrodeionization-solid oxide fuel cells (EDI-SOFC) integrated system was tested for energy capture from carbonaceous and nitrogenous pollutants in digestate or landfill leachate. The NH4+-N reduction increased the yields of hydrogen and ammonia in the EDI and CH4 reformation with C02 avoiding carbon deposition, along with an approximate doubling of the energy conversion efficiency in the SOFC over traditional combustion. The system achieved a net energy output 60% greater than conventional systems under optimal conditions of 3.0 V and 7.5 mm internal electrode distance in the EDI and 750 °C for the SOFC. The net energy balance ratio was upgraded from 1.11 to 1.75 in a local Hong Kong active landfill facility with carbonaceous (10.0 g/L COD) and nitrogenous pollutants (0.21 mol/L concentrated NH4+-N). Additionally, an average of 80% heavy metals and ions (potassium, calcium, magnesium, sodium, potassium, nitrate, phosphate, and sulfate), were recovered from raw landfill leachate by the electrodeionization stack. This study presents creative possibilities for more sustainable wastewater management..
Original languageEnglish
Title of host publicationMaterials for Energy, Efficiency and Sustainability - TechConnect Briefs 2017
PublisherTechConnect
Pages261-264
Number of pages4
Volume2
ISBN (Electronic)9780997511796
Publication statusPublished - 1 Jan 2017
Event11th Annual TechConnect World Innovation Conference and Expo, Held Jointly with the 20th Annual Nanotech Conference and Expo, and the 2017 National SBIR/STTR Conference - Washington, United States
Duration: 14 May 201717 May 2017

Conference

Conference11th Annual TechConnect World Innovation Conference and Expo, Held Jointly with the 20th Annual Nanotech Conference and Expo, and the 2017 National SBIR/STTR Conference
Country/TerritoryUnited States
CityWashington
Period14/05/1717/05/17

Keywords

  • Anaerobic treatment
  • Electrodeionization
  • Methane and ammonia reformation
  • Solid oxide fuel cell

ASJC Scopus subject areas

  • Fuel Technology
  • Surfaces, Coatings and Films
  • Biotechnology
  • Fluid Flow and Transfer Processes

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